Does our taste get "set" around the age of 20?

That's an interesting question. 

I don't know if it's possible to design a psychological experiment to test this theory, there are far too many factors that can interfere. But if you're interested in people's personal experiences, I personally listen to a lot of electronic music today, that I wasn't so keen on listening to around the age of 20. However, I find that my favourite electronic tracks happen to be those that were released when I was around the age of 20...

Of course, this may be just a coincidence. Or maybe those tracks were played at parties I went to around the age of 20, and although I wasn't listening to them at home, listening to them again invokes old memories?

Or maybe it's not so much about the artists or the style, but the quality of production, or the level of commercialism, or some other qualities that change with time in the music industry and that our collective ears get used to without us even knowing...

You may have a point there, it's the same for me, but to a lesser extent. I think it happens to many people with cars too, you know? Things like "who needs all those Evos and STis, give me an Integrale!".

What?  yer crazy when there is always such good stuff around

Never stop listening to all the good stuff around

Scissor Sisters  Killers  Paul Weller 

Akon Ft Snoop Doggy Dogg

oh yes and a daily dose of Bob Marley

Bless

Scotty   circa  1940 

Still I am only 66